# List of barangays in La Union

The province of La Union has 576 barangays comprising its 19 municipalities and 1 city.

## Barangays

| Barangay | Population | Population | Population | Population | Population | City or municipality |
| Barangay | 2010 | 2007 | 2000 | 1995 | 1990 | City or municipality |
| Abut | 511 | 501 | 427 | 407 | 387 | San Fernando |
| Acao | 4,233 | 3,981 | 3,985 | 3,348 | 3,161 | Bauang |
| Agdeppa | 1,148 | 1,110 | 976 | 885 | 868 | Bangar |
| Agpay | 692 | 695 | 576 | 514 | 472 | Burgos |
| Agtipal | 514 | 493 | 451 | 421 | 376 | Bacnotan |
| Aguioas | 934 | 911 | 890 | 841 | 773 | Naguilian |
| Al-alinao Norte | 1,293 | 1,103 | 1,092 | 1,088 | 1,004 | Naguilian |
| Al-alinao Sur | 843 | 883 | 962 | 889 | 766 | Naguilian |
| Alaska | 891 | 894 | 762 | 664 | 1,452 | Aringay |
| Alcala (Poblacion) | 825 | 724 | 745 | 773 | 746 | Luna |
| Alibangsay | 1,112 | 962 | 1,053 | 857 | 749 | Bagulin |
| Alipang | 928 | 865 | 838 | 816 | 798 | Rosario |
| Allangigan | 191 | 189 | 170 | 189 | 157 | San Juan |
| Almeida | 1,383 | 1,398 | 1,316 | 1,156 | 1,092 | Balaoan |
| Aludaid | 638 | 648 | 592 | 537 | 443 | San Juan |
| Alzate | 1,198 | 1,034 | 890 | 705 | 630 | Bangar |
| Amallapay | 1,878 | 1,893 | 1,703 | 1,779 | 1,500 | Tubao |
| Ambalite | 887 | 937 | 760 | 693 | 606 | Pugo |
| Ambangonan | 928 | 1,786 | 766 | 614 | 601 | Pugo |
| Ambangonan | 497 | 446 | 426 | 387 | 341 | Rosario |
| Ambaracao Norte | 1,533 | 1,455 | 1,511 | 1,443 | 1,290 | Naguilian |
| Ambaracao Sur | 772 | 666 | 738 | 644 | 589 | Naguilian |
| Ambitacay | 789 | 807 | 678 | 629 | 562 | Agoo |
| Ambitacay | 581 | 606 | 549 | 480 | 480 | Santo Tomas |
| Amlang | 2,088 | 1,974 | 1,722 | 1,473 | 1,398 | Rosario |
| Amontoc | 1,818 | 1,699 | 1,567 | 1,421 | 1,286 | San Gabriel |
| Anduyan | 1,718 | 1,822 | 1,472 | 1,450 | 1,213 | Tubao |
| Angin | 731 | 729 | 745 | 641 | 656 | Naguilian |
| Antonino | 768 | 897 | 864 | 925 | – | Balaoan |
| Apaleng | 458 | 454 | 472 | 442 | 424 | San Fernando |
| Apatut | 774 | 746 | 665 | 547 | 583 | Balaoan |
| Apayao | 878 | 771 | 943 | 834 | 842 | San Gabriel |
| Ar-arampang | 854 | 887 | 770 | 730 | 579 | Balaoan |
| Arosip | 453 | 348 | 396 | 370 | 342 | Bacnotan |
| Ayaoan | 665 | 663 | 648 | 624 | 558 | Luna |
| Baay | 1,004 | 906 | 843 | 714 | 634 | Bagulin |
| Bacani | 1,285 | 1,153 | 959 | 878 | 668 | Rosario |
| Baccuit Norte | 2,244 | 2,221 | 1,979 | 1,742 | 1,613 | Bauang |
| Baccuit Sur | 2,095 | 2,170 | 1,867 | 1,599 | 1,452 | Bauang |
| Bacqui | 468 | 514 | 405 | 358 | 364 | Bacnotan |
| Bacsayan | 754 | 634 | 619 | 575 | 511 | San Juan |
| Bacsil | 719 | 658 | 561 | 535 | 476 | Bacnotan |
| Bacsil | 607 | 564 | 559 | 470 | 449 | San Fernando |
| Bagbag | 1,121 | 882 | 1,127 | 1,022 | 870 | Bauang |
| Bagutot | 210 | 196 | 206 | 187 | 179 | Bacnotan |
| Bail | 2,227 | 2,185 | 1,962 | 1,818 | 1,694 | Santo Tomas |
| Balaoc | 1,373 | 1,157 | 1,095 | 1,095 | 1,071 | Santo Tomas |
| Balawarte | 1,550 | 1,429 | 1,207 | 971 | 1,172 | Agoo |
| Balbalayang | 648 | 554 | 571 | 555 | 524 | San Gabriel |
| Balballosa | 475 | 447 | 390 | 344 | 388 | San Juan |
| Balecbec | 824 | 747 | 803 | 650 | 650 | Naguilian |
| Ballay | 1,608 | 1,611 | 1,460 | 1,333 | 1,204 | Bauang |
| Ballogo | 920 | 998 | 653 | 530 | 517 | Bacnotan |
| Balsaan | 875 | 770 | 685 | 683 | 649 | Santo Tomas |
| Bambanay | 499 | 530 | 488 | 474 | 437 | San Juan |
| Bancagan | 1,231 | 1,218 | 996 | 907 | 814 | Naguilian |
| Bangaoilan East | 1,049 | 997 | 953 | 879 | 831 | Bangar |
| Bangaoilan West | 865 | 890 | 825 | 647 | 713 | Bangar |
| Bangar | 916 | 746 | 685 | 443 | 450 | Rosario |
| Bangbangolan | 590 | 536 | 392 | 421 | 410 | San Fernando |
| Bangcusay | 1,339 | 1,160 | 1,089 | 938 | 893 | San Fernando |
| Bani | 1,554 | 1,517 | 1,284 | 1,034 | 939 | Rosario |
| Baracbac Este | 991 | 1,043 | 991 | 936 | 905 | Balaoan |
| Baracbac Oeste | 367 | 353 | 319 | 322 | 291 | Balaoan |
| Barangay I (Poblacion) | 2,192 | 2,392 | 2,280 | 2,489 | 2,244 | San Fernando |
| Barangay II (Poblacion) | 475 | 592 | 674 | 693 | 856 | San Fernando |
| Barangay III (Poblacion) | 294 | 426 | 449 | 615 | 645 | San Fernando |
| Barangay IV (Poblacion) | 805 | 935 | 870 | 1,125 | 1,206 | San Fernando |
| Barangobong | 907 | 875 | 846 | 781 | 812 | Luna |
| Baraoas | 980 | 965 | 794 | 606 | 698 | San Fernando |
| Baraoas Norte | 866 | 805 | 737 | 673 | 576 | Naguilian |
| Baraoas Sur | 3,153 | 3,097 | 2,553 | 2,094 | 1,659 | Naguilian |
| Bariquir | 1,761 | 1,713 | 1,408 | 1,182 | 1,046 | Naguilian |
| Baroro | 2,489 | 2,348 | 2,040 | 1,827 | 1,679 | Bacnotan |
| Barraca | 1,154 | 1,158 | 1,168 | 1,081 | 1,004 | Bangar |
| Barrientos | 1,803 | 1,828 | 1,607 | 1,560 | 1,507 | Luna |
| Basca | 2,050 | 1,843 | 1,838 | 1,850 | 1,269 | Aringay |
| Bato | 1,530 | 1,397 | 1,351 | 1,331 | 1,131 | Naguilian |
| Bato | 989 | 898 | 784 | 741 | 719 | San Fernando |
| Bautista | 1,071 | 2,224 | 880 | 790 | 579 | Caba |
| Bawanta | 998 | 995 | 818 | 811 | 715 | Bauang |
| Bayabas | 513 | 424 | 442 | 443 | 430 | San Gabriel |
| Baybay | 1,415 | 1,338 | 1,310 | 1,303 | 1,226 | Santo Tomas |
| Benteng-Sapilang | 1,187 | 896 | 1,010 | 860 | 807 | Rosario |
| Bet-ang | 669 | 629 | 620 | 575 | 710 | Balaoan |
| Biday | 3,317 | 2,685 | 2,292 | 1,972 | 1,695 | San Fernando |
| Bigbiga | 1,133 | 998 | 940 | 1,017 | 906 | Sudipen |
| Bilis | 1,096 | 1,073 | 934 | 809 | 608 | Burgos |
| Bimmotobot | 1,031 | 1,002 | 885 | 860 | 754 | Naguilian |
| Birunget | 464 | 446 | 435 | 347 | 359 | San Fernando |
| Bitalag | 1,562 | 1,489 | 1,286 | 1,162 | 1,096 | Bacnotan |
| Boy-utan | 1,177 | 1,099 | 1,004 | 704 | 967 | Bauang |
| Bucao | 1,731 | 1,697 | 1,418 | 1,122 | 1,156 | San Gabriel |
| Bucayab | 1,279 | 1,212 | 1,172 | 951 | 972 | Bauang |
| Bugbugcao | 643 | 569 | 527 | 458 | 478 | San Juan |
| Bulala | 1,219 | 1,145 | 1,079 | 851 | 886 | Bacnotan |
| Bulalaan | 621 | 653 | 593 | 659 | 526 | Sudipen |
| Bulbulala | 1,569 | 1,502 | 1,343 | 1,189 | 1,153 | Balaoan |
| Bumbuneg | 2,187 | 2,183 | 2,052 | 1,922 | 1,776 | San Gabriel |
| Bungol | 1,419 | 1,329 | 1,268 | 1,109 | 1,072 | Balaoan |
| Bungro | 444 | 443 | 460 | 382 | 409 | Luna |
| Bungro | 1,272 | 1,237 | 1,086 | 967 | 879 | San Fernando |
| Burayoc | 395 | 351 | 297 | 249 | 236 | Bacnotan |
| Buselbusel | 1,119 | 1,119 | 1,105 | 985 | 886 | Luna |
| Bussaoit | 634 | 659 | 585 | 497 | 431 | Bacnotan |
| Butubut Este | 800 | 775 | 702 | 681 | 667 | Balaoan |
| Butubut Norte | 1,193 | 1,177 | 887 | 912 | 828 | Balaoan |
| Butubut Oeste | 698 | 682 | 576 | 543 | 517 | Balaoan |
| Butubut Sur | 702 | 778 | 789 | 696 | 654 | Balaoan |
| Caarusipan | 279 | 272 | 231 | 214 | 182 | San Juan |
| Cabalayangan | 1,537 | 1,572 | 1,508 | 1,489 | 1,476 | Bauang |
| Cabalitocan | 1,037 | 1,016 | 938 | 942 | 793 | Luna |
| Cabaritan Norte | 540 | 504 | 474 | 448 | 405 | Naguilian |
| Cabaritan Sur | 1,947 | 1,836 | 1,560 | 1,501 | 1,407 | Naguilian |
| Cabaroan | 1,751 | 1,629 | 1,363 | 1,167 | 995 | Bacnotan |
| Cabaroan | 1,312 | 1,257 | 1,170 | 1,003 | 1,012 | San Juan |
| Cabaroan (Negro) | 3,405 | 3,341 | 2,809 | 2,396 | 2,046 | San Fernando |
| Cabarsican | 1,103 | 1,040 | 828 | 728 | 660 | Bacnotan |
| Cabarsican | 423 | 382 | 359 | 289 | 238 | San Fernando |
| Cabaruan | 1,454 | 1,320 | 1,307 | 1,362 | 1,149 | Santo Tomas |
| Cabisilan | 693 | 659 | 476 | 440 | 340 | Bauang |
| Cabuaan Oeste (Poblacion) | 1,066 | 1,049 | 941 | 943 | 1,823 | Balaoan |
| Cabugao | 477 | 426 | 408 | 374 | 322 | Bacnotan |
| Cabugnayan | 835 | 818 | 824 | 744 | 589 | San Juan |
| Cacapian | 1,105 | 1,131 | 962 | 924 | 891 | San Juan |
| Caculangan | 461 | 387 | 363 | 353 | 310 | San Juan |
| Cadaclan | 1,446 | 1,352 | 1,168 | 1,028 | 983 | San Fernando |
| Cadapli | 1,361 | 1,423 | 1,296 | 1,120 | 1,037 | Bangar |
| Cadumanian | 1,033 | 927 | 871 | 792 | 725 | Rosario |
| Caggao | 170 | 141 | 103 | 108 | 76 | Bangar |
| Calabugao | 447 | 495 | 428 | 406 | 400 | San Fernando |
| Calautit | 690 | 636 | 556 | 526 | 472 | Bacnotan |
| Calincamasan | 930 | 884 | 858 | 735 | 751 | San Juan |
| Calliat | 1,301 | 1,127 | 1,008 | 964 | 898 | Balaoan |
| Calumbaya | 2,381 | 2,273 | 2,330 | 2,074 | 1,911 | Bauang |
| Calungbuyan | 1,422 | 1,497 | 1,276 | 1,118 | 1,047 | Balaoan |
| Camansi | 871 | 798 | 858 | 571 | 559 | San Fernando |
| Cambaly | 1,691 | 1,832 | 1,927 | 1,763 | 1,510 | Bagulin |
| Camiling | 1,081 | 1,051 | 808 | 896 | 767 | Balaoan |
| Camp One | 2,823 | 2,591 | 2,302 | 1,529 | 1,858 | Rosario |
| Canaoay | 1,610 | 1,541 | 1,345 | 1,196 | 1,088 | San Fernando |
| Cantoria No. 1 | 500 | 490 | 511 | 440 | 427 | Luna |
| Cantoria No. 2 | 773 | 803 | 750 | 666 | 658 | Luna |
| Cantoria No. 3 | 753 | 705 | 642 | 567 | 474 | Luna |
| Cantoria No. 4 | 558 | 429 | 458 | 439 | 407 | Luna |
| Caoayan | 455 | 556 | 411 | 329 | 361 | Burgos |
| Caoigue | 1,220 | 1,082 | 1,099 | 914 | 870 | Tubao |
| Capas | 941 | 968 | 798 | 712 | 597 | Agoo |
| Carcarmay | 543 | 564 | 504 | 492 | 402 | Bacnotan |
| Cardiz | 1,350 | 1,182 | 1,281 | 1,275 | 1,099 | Bagulin |
| Cares | 1,900 | 3,546 | 1,241 | 1,199 | 985 | Pugo |
| Carisquis | 701 | 646 | 594 | 503 | 482 | Luna |
| Carlatan | 2,443 | 3,024 | 2,778 | 2,884 | 2,775 | San Fernando |
| Carmay | 466 | 453 | 433 | 376 | 339 | Bauang |
| Carunuan East | 1,425 | 1,419 | 1,178 | 1,077 | 921 | Rosario |
| Carunuan West | 1,297 | 1,336 | 1,221 | 1,019 | 847 | Rosario |
| Casantaan | 1,991 | 1,820 | 1,630 | 1,428 | 1,159 | Santo Tomas |
| Casiaman | 867 | 790 | 727 | 690 | 659 | Bacnotan |
| Casilagan | 1,085 | 1,127 | 1,055 | 994 | 903 | Bauang |
| Casilagan | 1,896 | 2,004 | 1,999 | 1,878 | 1,615 | Naguilian |
| Casilagan | 587 | 579 | 576 | 489 | 404 | Rosario |
| Casilagan | 804 | 782 | 630 | 564 | 514 | San Juan |
| Casilagan | 1,557 | 1,592 | 1,391 | 1,115 | 1,269 | Santo Tomas |
| Castro | 1,578 | 1,425 | 1,332 | 1,254 | 1,139 | Sudipen |
| Cataguingtingan | 2,528 | 2,505 | 2,126 | 1,826 | 1,571 | Rosario |
| Catbangen | 9,857 | 9,717 | 8,267 | 8,707 | 8,159 | San Fernando |
| Catdongan | 460 | 459 | 389 | 354 | 346 | San Juan |
| Central East (Poblacion) | 4,249 | 4,204 | 3,652 | 3,467 | 3,313 | Bauang |
| Central East No. 1 (Poblacion) | 478 | 503 | 435 | 450 | 424 | Bangar |
| Central East No. 2 (Poblacion) | 1,087 | 994 | 1,088 | 973 | 1,007 | Bangar |
| Central West (Poblacion) | 3,951 | 3,622 | 3,466 | 3,526 | 3,080 | Bauang |
| Central West No. 1 (Poblacion) | 514 | 527 | 480 | 498 | 500 | Bangar |
| Central West No. 2 (Poblacion) | 586 | 657 | 639 | 626 | 546 | Bangar |
| Central West No. 3 (Poblacion) | 612 | 633 | 612 | 584 | 527 | Bangar |
| Concepcion | 3,206 | 2,937 | 2,172 | 1,850 | 1,617 | Rosario |
| Consolacion (Poblacion) | 1,662 | 1,598 | 1,434 | 1,473 | 1,305 | Agoo |
| Consuegra | 1,334 | 1,243 | 1,192 | 1,151 | 943 | Bangar |
| Corrooy | 2,136 | 2,176 | 2,066 | 1,899 | 1,773 | Santol |
| Cuenca | 1,713 | 1,774 | 1,615 | 1,519 | 1,276 | Pugo |
| Cupang | 1,398 | 1,324 | 1,223 | 1,018 | 934 | Santo Tomas |
| Dagup | 2,107 | 2,049 | 1,934 | 1,745 | 1,708 | Bagulin |
| Daking | 924 | 928 | 848 | 793 | 715 | San Gabriel |
| Dal-lipaoen | 1,746 | 1,686 | 1,737 | 1,548 | 1,481 | Naguilian |
| Dalacdac | 288 | 263 | 232 | 263 | 170 | Burgos |
| Dallangayan Este | 1,281 | 1,192 | 735 | 824 | 812 | San Fernando |
| Dallangayan Oeste | 1,746 | 1,856 | 1,495 | 1,194 | 912 | San Fernando |
| Dalumpinas Este | 1,373 | 1,252 | 1,204 | 864 | 722 | San Fernando |
| Dalumpinas Oeste | 1,466 | 1,970 | 1,683 | 1,202 | 1,051 | San Fernando |
| Damortis | 2,352 | 2,191 | 2,021 | 1,697 | 1,597 | Rosario |
| Damortis | 2,265 | 2,519 | 2,102 | 2,082 | 2,056 | Santo Tomas |
| Dangdangla | 902 | 824 | 784 | 709 | 683 | San Juan |
| Daramuangan | 1,015 | 967 | 890 | 869 | 747 | Naguilian |
| Darigayos | 1,466 | 1,621 | 1,465 | 1,260 | 1,120 | Luna |
| Dasay | 653 | 664 | 579 | 546 | 441 | San Juan |
| Delles | 1,450 | 1,343 | 1,226 | 1,114 | 955 | Burgos |
| Dili | 1,674 | 1,924 | 1,570 | 1,448 | 1,249 | Bauang |
| Dinanum | 706 | 623 | 566 | 468 | 419 | San Juan |
| Disso-or | 946 | 826 | 765 | 686 | 620 | Bauang |
| Dr. Camilo Osias Poblacion (Cabuaan Este) | 1,812 | 1,784 | 1,768 | 1,512 | 1,530 | Balaoan |
| Dulao | 3,284 | 3,045 | 2,865 | 2,510 | 2,439 | Aringay |
| Duplas | 604 | 577 | 526 | 502 | 469 | Pugo |
| Duplas | 591 | 575 | 531 | 532 | 514 | San Juan |
| Duplas | 1,007 | 955 | 945 | 930 | 851 | Sudipen |
| Fernando | 1,003 | 1,017 | 888 | 776 | 723 | Santo Tomas |
| Francia Sur | 1,587 | 1,519 | 1,281 | 1,183 | 1,164 | Tubao |
| Francia West | 1,467 | 1,632 | 1,315 | 1,131 | 1,153 | Tubao |
| Gallano | 1,014 | 885 | 926 | 915 | 910 | Aringay |
| Galongen | 982 | 1,003 | 963 | 943 | 883 | Bacnotan |
| Gana | 2,327 | 2,367 | 2,139 | 1,990 | 1,795 | Caba |
| Garcia | 1,536 | 1,492 | 1,461 | 1,514 | 1,389 | Tubao |
| General Prim East | 834 | 849 | 835 | 774 | 663 | Bangar |
| General Prim West | 1,491 | 1,466 | 1,300 | 1,180 | 1,097 | Bangar |
| General Terrero | 939 | 867 | 729 | 649 | 564 | Bangar |
| Gonzales | 1,412 | 1,645 | 1,583 | 1,472 | 1,341 | Tubao |
| Guerrero | 967 | 974 | 890 | 754 | 639 | Bauang |
| Guesset | 1,265 | 1,193 | 1,182 | 1,051 | 922 | Naguilian |
| Guinabang | 872 | 870 | 865 | 781 | 644 | Bacnotan |
| Guinaburan | 811 | 759 | 786 | 663 | 635 | Balaoan |
| Guinguinabang | 528 | 543 | 480 | 465 | 472 | San Juan |
| Gumot-Nagcolaran | 1,695 | 1,495 | 1,440 | 1,237 | 1,176 | Rosario |
| Gusing Norte | 1,525 | 1,714 | 1,664 | 1,562 | 1,404 | Naguilian |
| Gusing Sur | 1,542 | 1,106 | 1,100 | 1,140 | 898 | Naguilian |
| Halog East | 859 | 826 | 1,043 | 849 | 695 | Tubao |
| Halog West | 1,314 | 1,343 | 1,267 | 1,163 | 1,132 | Tubao |
| Ili Norte (Poblacion) | 2,458 | 2,001 | 2,222 | 2,045 | 1,645 | San Juan |
| Ili Sur (Poblacion) | 2,356 | 2,342 | 2,319 | 2,058 | 1,746 | San Juan |
| Ilocano | 877 | 831 | 757 | 667 | 668 | Sudipen |
| Ilocanos Norte | 1,372 | 1,518 | 1,479 | 1,430 | 1,558 | San Fernando |
| Ilocanos Sur | 2,721 | 3,123 | 3,035 | 3,036 | 3,548 | San Fernando |
| Imelda | 322 | 349 | 313 | 318 | 284 | Burgos |
| Imelda | 1,415 | 1,338 | 1,254 | 1,058 | 1,191 | Naguilian |
| Inabaan Norte | 1,769 | 1,439 | 1,427 | 1,210 | 1,053 | Rosario |
| Inabaan Sur | 1,312 | 1,174 | 1,192 | 1,112 | 1,095 | Rosario |
| Ipet | 1,571 | 1,512 | 1,376 | 1,235 | 1,048 | Sudipen |
| Juan Cartas | 741 | 670 | 643 | 673 | 617 | Caba |
| Lacong | 1,314 | 1,417 | 1,341 | 1,188 | 1,103 | San Gabriel |
| Langcuas | 1,667 | 1,476 | 1,208 | 833 | 779 | San Fernando |
| Las-ud | 1,231 | 1,096 | 1,174 | 1,000 | 915 | Caba |
| Legleg | 537 | 534 | 521 | 482 | 413 | Bacnotan |
| Legleg | 565 | 549 | 482 | 470 | 435 | San Juan |
| Leones East | 1,440 | 1,376 | 1,297 | 1,211 | 1,037 | Tubao |
| Leones West | 1,383 | 1,344 | 1,213 | 1,168 | 1,008 | Tubao |
| Lettac Norte | 1,072 | 918 | 889 | 821 | 783 | Santol |
| Lettac Sur | 1,067 | 1,057 | 955 | 954 | 868 | Santol |
| Libbo | 785 | 671 | 736 | 668 | 540 | Bagulin |
| Libtong | 543 | 1,035 | 466 | 366 | 433 | Burgos |
| Linapew | 1,281 | 1,264 | 1,121 | 1,043 | 962 | Tubao |
| Lingsat | 7,019 | 7,545 | 7,167 | 6,639 | 5,703 | San Fernando |
| Linong | 634 | 569 | 529 | 412 | 372 | Santo Tomas |
| Linuan | 399 | 398 | 345 | 272 | 232 | Burgos |
| Lioac Norte | 1,465 | 1,424 | 1,276 | 1,205 | 1,003 | Naguilian |
| Lioac Sur | 1,226 | 1,013 | 1,019 | 1,009 | 819 | Naguilian |
| Lipay Este | 482 | 432 | 413 | 377 | 378 | San Gabriel |
| Lipay Norte | 579 | 554 | 553 | 475 | 463 | San Gabriel |
| Lipay Proper | 374 | 307 | 349 | 341 | 301 | San Gabriel |
| Lipay Sur | 879 | 706 | 608 | 581 | 499 | San Gabriel |
| Liquicia | 1,155 | 1,073 | 1,105 | 1,006 | 812 | Caba |
| Lisqueb | 854 | 831 | 741 | 707 | 611 | Bacnotan |
| Lloren | 3,277 | 3,051 | 2,771 | 2,433 | 2,228 | Tubao |
| Lomboy | 1,319 | 1,403 | 1,250 | 1,108 | 961 | Santo Tomas |
| Lon-oy | 715 | 635 | 709 | 707 | 647 | San Gabriel |
| Lower San Agustin | 1,123 | 1,065 | 912 | 886 | 816 | Bauang |
| Lower Tumapoc | 384 | 327 | 301 | 278 | 258 | Burgos |
| Lubing | 878 | 888 | 736 | 634 | 619 | San Juan |
| Luzong Norte | 1,276 | 1,208 | 1,136 | 1,030 | 948 | Bangar |
| Luzong Sur | 901 | 856 | 906 | 797 | 755 | Bangar |
| Mabanengbeng 1st | 323 | 275 | 245 | 254 | 243 | Bacnotan |
| Mabanengbeng 2nd | 339 | 300 | 278 | 248 | 258 | Bacnotan |
| Macabato | 1,235 | 1,200 | 1,158 | 1,019 | 1,010 | Aringay |
| Macalva Central | 615 | 617 | 567 | 490 | 502 | Agoo |
| Macalva Norte | 1,095 | 1,053 | 954 | 787 | 772 | Agoo |
| Macalva Sur | 1,332 | 1,262 | 1,138 | 1,036 | 922 | Agoo |
| Madayegdeg | 1,830 | 1,768 | 1,722 | 1,449 | 1,302 | San Fernando |
| Magallanes (Poblacion) | 1,934 | 1,835 | 1,643 | 1,576 | 1,317 | Luna |
| Magsaysay | 1,458 | 1,415 | 1,279 | 1,001 | 870 | Tubao |
| Magsiping | 850 | 792 | 783 | 684 | 597 | Luna |
| Magungunay | 858 | 717 | 863 | 717 | 695 | Naguilian |
| Malabago | 449 | 394 | 259 | 267 | 237 | Santo Tomas |
| Maliclico | 921 | 792 | 898 | 831 | 811 | Sudipen |
| Mamat-ing Norte | 719 | 690 | 674 | 765 | 723 | Naguilian |
| Mamat-ing Sur | 1,290 | 1,126 | 1,019 | 875 | 886 | Naguilian |
| Mamay | 357 | 306 | 325 | 318 | 350 | Luna |
| Mameltac | 1,372 | 1,410 | 957 | 873 | 717 | San Fernando |
| Manga | 1,465 | 1,336 | 1,215 | 1,034 | 853 | Aringay |
| Mangaan | 1,066 | 1,044 | 986 | 939 | 764 | Santol |
| Maoasoas Norte | 1,212 | 1,114 | 963 | 813 | 793 | Pugo |
| Maoasoas Sur | 973 | 919 | 827 | 569 | 473 | Pugo |
| Maragayap | 537 | 519 | 430 | 345 | 343 | Bacnotan |
| Marcos | 1,396 | 1,222 | 1,107 | 1,129 | 1,073 | Rosario |
| Maria Cristina East | 869 | 847 | 897 | 827 | 764 | Bangar |
| Maria Cristina West | 1,013 | 1,081 | 1,064 | 973 | 911 | Bangar |
| Masicong | 435 | 455 | 362 | 308 | 297 | San Fernando |
| Masupe | 943 | 913 | 838 | 752 | 816 | Balaoan |
| Mindoro | 1,570 | 1,451 | 1,486 | 1,346 | 1,233 | Bangar |
| Nadsaag | 765 | 798 | 753 | 655 | 584 | San Juan |
| Nagatiran | 645 | 589 | 601 | 594 | 561 | Bacnotan |
| Nagrebcan | 1,443 | 1,392 | 1,275 | 917 | 890 | Bauang |
| Nagrebcan | 885 | 791 | 754 | 726 | 722 | Luna |
| Nagsabaran | 1,335 | 1,232 | 1,096 | 838 | 786 | Bangar |
| Nagsabaran | 500 | 530 | 430 | 458 | 486 | San Juan |
| Nagsabaran Norte | 1,541 | 1,445 | 1,393 | 1,430 | 1,291 | Balaoan |
| Nagsabaran Sur | 1,023 | 1,033 | 951 | 918 | 731 | Balaoan |
| Nagsaraboan | 1,100 | 1,041 | 1,029 | 926 | 906 | Bacnotan |
| Nagsidorisan | 939 | 895 | 831 | 730 | 682 | Naguilian |
| Nagsimbaanan | 661 | 691 | 684 | 637 | 603 | Bacnotan |
| Nagtagaan | 1,632 | 1,562 | 1,409 | 1,390 | 1,193 | Rosario |
| Naguirangan | 689 | 606 | 626 | 585 | 541 | San Juan |
| Naguituban | 1,112 | 943 | 923 | 818 | 671 | San Juan |
| Nagyubuyuban | 1,226 | 1,226 | 1,143 | 790 | 792 | San Fernando |
| Nagyubuyuban | 424 | 375 | 382 | 285 | 286 | San Juan |
| Nalasin | 1,488 | 1,457 | 1,467 | 1,303 | 1,333 | Balaoan |
| Nalvo Norte | 1,240 | 1,112 | 936 | 931 | 841 | Luna |
| Nalvo Sur | 1,530 | 2,730 | 1,214 | 1,185 | 1,116 | Luna |
| Namaltugan | 914 | 931 | 829 | 665 | 743 | Sudipen |
| Namboongan | 2,214 | 1,930 | 1,976 | 1,669 | 1,854 | Santo Tomas |
| Namonitan | 2,050 | 1,787 | 1,353 | 942 | 791 | Santo Tomas |
| Namtutan | 772 | 517 | 622 | 502 | 453 | San Fernando |
| Nangalisan | 741 | 736 | 645 | 604 | 541 | Bacnotan |
| Nancamotian | 789 | 751 | 626 | 514 | 446 | Rosario |
| Napaset | 645 | 673 | 615 | 522 | 556 | Balaoan |
| Napaset | 1,256 | 1,259 | 1,285 | 1,199 | 1,117 | Luna |
| Narra | 1,203 | 1,113 | 1,035 | 1,012 | 873 | Bacnotan |
| Narra Este | 490 | 465 | 412 | 346 | 295 | San Fernando |
| Narra Oeste | 546 | 518 | 418 | 387 | 390 | San Fernando |
| Narvacan | 559 | 571 | 502 | 544 | 941 | Santo Tomas |
| Natividad (Poblacion) | 2,656 | 2,454 | 2,068 | 1,742 | 1,763 | Naguilian |
| Nazareno | 1,874 | 1,775 | 1,651 | 1,536 | 1,378 | Agoo |
| New Poblacion | 897 | 925 | 767 | 764 | 708 | Burgos |
| Oaqui No. 1 | 532 | 544 | 521 | 485 | 460 | Luna |
| Oaqui No. 2 | 362 | 331 | 307 | 308 | 261 | Luna |
| Oaqui No. 3 | 632 | 637 | 588 | 590 | 577 | Luna |
| Oaqui No. 4 | 699 | 762 | 716 | 713 | 705 | Luna |
| Oaquing | 314 | 299 | 307 | 266 | 264 | San Juan |
| Old Central | 1,281 | 1,294 | 1,139 | 931 | 956 | Sudipen |
| Old Poblacion | 492 | 507 | 469 | 456 | 420 | Burgos |
| Ortega | 873 | 721 | 752 | 738 | 651 | Bacnotan |
| Ortiz (Poblacion) | 2,665 | 2,412 | 2,570 | 2,479 | 2,450 | Naguilian |
| Oya-oy | 503 | 498 | 505 | 490 | 417 | Bacnotan |
| Pa-o | 595 | 601 | 510 | 480 | 454 | Balaoan |
| Paagan | 571 | 538 | 529 | 483 | 412 | Bacnotan |
| Paagan | 1,364 | 1,351 | 1,430 | 1,255 | 1,170 | Santol |
| Pacpacac | 430 | 416 | 414 | 319 | 320 | San Juan |
| Pacpaco | 911 | 863 | 793 | 762 | 781 | San Fernando |
| Pagbennecan | 876 | 804 | 742 | 656 | 639 | Balaoan |
| Pagdalagan | 3,221 | 3,164 | 2,710 | 2,383 | 1,983 | San Fernando |
| Pagdalagan Sur | 2,553 | 2,410 | 2,252 | 1,937 | 1,687 | Bauang |
| Pagdaraoan | 2,031 | 2,210 | 2,053 | 2,104 | 2,014 | San Fernando |
| Pagdildilan | 457 | 445 | 391 | 338 | 334 | San Juan |
| Pagleddegan | 647 | 661 | 626 | 582 | 534 | Balaoan |
| Pagudpud | 2,155 | 2,305 | 1,956 | 1,557 | 1,325 | San Fernando |
| Palina | 1,300 | 1,098 | 790 | 720 | 658 | Pugo |
| Palintucang | 973 | 965 | 772 | 732 | 634 | Bauang |
| Palugsi-Limmansangan | 1,357 | 1,512 | 1,339 | 1,248 | 1,110 | Bauang |
| Pandan | 1,142 | 1,043 | 973 | 862 | 729 | Bacnotan |
| Pang-Pang | 231 | 177 | 156 | 134 | 130 | Bacnotan |
| Pangao-aoan East | 1,221 | 1,088 | 1,130 | 984 | 904 | Aringay |
| Pangao-aoan West | 807 | 832 | 696 | 667 | 638 | Aringay |
| Panicsican | 1,242 | 1,189 | 947 | 845 | 786 | San Juan |
| Pantar Norte | 1,469 | 1,379 | 1,416 | 1,303 | 1,226 | Balaoan |
| Pantar Sur | 872 | 836 | 748 | 790 | 735 | Balaoan |
| Pao Norte | 662 | 596 | 579 | 595 | 619 | San Fernando |
| Pao Sur | 403 | 426 | 436 | 470 | 437 | San Fernando |
| Paraoir | 1,995 | 1,978 | 1,832 | 1,498 | 1,415 | Balaoan |
| Parasapas | 1,757 | 1,650 | 1,489 | 1,366 | 1,238 | Rosario |
| Paratong No. 3 | 1,019 | 949 | 913 | 849 | 760 | Bangar |
| Paratong No. 4 | 777 | 750 | 722 | 669 | 616 | Bangar |
| Paratong Norte | 1,508 | 1,388 | 1,256 | 1,066 | 929 | Bangar |
| Parian | 3,313 | 3,229 | 2,856 | 1,851 | 1,467 | San Fernando |
| Parian Este | 1,905 | 2,199 | 1,582 | 1,731 | 1,432 | Bauang |
| Parian Oeste | 1,141 | 1,090 | 871 | 815 | 744 | Bauang |
| Paringao | 3,850 | 3,644 | 3,827 | 3,264 | 3,230 | Bauang |
| Patac | 2,978 | 2,317 | 2,362 | 2,034 | 1,899 | Santo Tomas |
| Patpata | 1,381 | 1,234 | 1,038 | 1,036 | 945 | Balaoan |
| Payocpoc Norte Este | 1,212 | 1,082 | 914 | 865 | 796 | Bauang |
| Payocpoc Norte Oeste | 1,633 | 1,828 | 1,632 | 1,336 | 1,216 | Bauang |
| Payocpoc Sur | 2,528 | 2,810 | 2,196 | 1,656 | 1,723 | Bauang |
| Pias | 1,262 | 1,187 | 1,013 | 900 | 652 | San Fernando |
| Pideg | 1,447 | 1,352 | 1,294 | 1,252 | 1,173 | Tubao |
| Pila | 1,349 | 1,188 | 1,075 | 1,062 | 1,023 | Luna |
| Pilar | 379 | 467 | 812 | 922 | 675 | Bauang |
| Pitpitac | 667 | 625 | 589 | 519 | 489 | Luna |
| Poblacion | 3,464 | 3,660 | 3,311 | 2,959 | 2,828 | Aringay |
| Poblacion | 3,466 | 3,407 | 2,907 | 2,726 | 2,379 | Bacnotan |
| Poblacion | 2,743 | 2,793 | 2,312 | 2,117 | 1,963 | San Gabriel |
| Poblacion | 1,696 | 1,673 | 1,688 | 1,665 | 1,806 | Santo Tomas |
| Poblacion | 1,469 | 1,476 | 1,269 | 1,154 | 1,105 | Santol |
| Poblacion | 1,068 | 1,166 | 1,023 | 960 | 871 | Sudipen |
| Poblacion | 748 | 677 | 787 | 864 | 911 | Tubao |
| Poblacion East | 875 | 869 | 787 | 718 | 722 | Pugo |
| Poblacion East | 2,093 | 2,557 | 2,417 | 2,655 | 2,401 | Rosario |
| Poblacion Norte | 1,291 | 1,243 | 1,368 | 1,360 | 1,209 | Caba |
| Poblacion Sur | 957 | 885 | 940 | 887 | 806 | Caba |
| Poblacion West | 1,024 | 919 | 929 | 866 | 802 | Pugo |
| Poblacion West | 1,690 | 1,698 | 1,632 | 1,527 | 1,301 | Rosario |
| Polipol | 843 | 703 | 783 | 613 | 449 | San Gabriel |
| Pongpong | 1,504 | 1,437 | 1,449 | 1,289 | 1,326 | Santo Tomas |
| Poro | 6,626 | 5,956 | 5,231 | 5,356 | 4,606 | San Fernando |
| Porporiket | 834 | 716 | 685 | 680 | 621 | Sudipen |
| Pottot | 1,237 | 1,208 | 1,023 | 910 | 786 | Bauang |
| Pudoc | 1,455 | 1,488 | 1,246 | 1,059 | 939 | Bauang |
| Pugo | 2,703 | 2,633 | 2,178 | 1,696 | 1,547 | Bauang |
| Puguil | 1,096 | 1,141 | 1,140 | 959 | 966 | Santol |
| Purok | 617 | 630 | 619 | 677 | 588 | Agoo |
| Puspus | 475 | 415 | 471 | 411 | 449 | San Fernando |
| Puzon | 824 | 821 | 740 | 669 | 531 | Rosario |
| Quidem | 205 | 158 | 166 | 150 | 145 | San Juan |
| Quinavite | 3,417 | 3,464 | 2,946 | 2,760 | 2,170 | Bauang |
| Quintarong | 1,086 | 1,014 | 1,074 | 914 | 858 | Bangar |
| Quirino | 986 | 954 | 1,114 | 1,436 | 1,247 | Bacnotan |
| Rabon | 990 | 736 | 660 | 520 | 488 | Rosario |
| Ramot | 630 | 587 | 541 | 485 | 479 | Santol |
| Raois | 925 | 890 | 775 | 789 | 736 | Bacnotan |
| Raois | 1,046 | 954 | 981 | 955 | 1,039 | Santo Tomas |
| Reyna Regente | 1,028 | 904 | 875 | 788 | 690 | Bangar |
| Ribsuan | 972 | 774 | 839 | 816 | 659 | Naguilian |
| Rimos No. 1 | 730 | 686 | 670 | 661 | 601 | Luna |
| Rimos No. 2 | 544 | 475 | 554 | 498 | 485 | Luna |
| Rimos No. 3 | 759 | 785 | 766 | 642 | 609 | Luna |
| Rimos No. 4 | 798 | 831 | 824 | 780 | 752 | Luna |
| Rimos No. 5 | 1,312 | 1,337 | 1,130 | 1,044 | 949 | Luna |
| Rissing | 2,279 | 2,308 | 1,959 | 1,958 | 1,623 | Bangar |
| Rissing | 401 | 354 | 313 | 278 | 264 | Luna |
| Rizal | 1,400 | 1,282 | 1,374 | 1,331 | 1,294 | Tubao |
| Sablut | 805 | 763 | 684 | 672 | 752 | Balaoan |
| Sacyud | 550 | 552 | 590 | 514 | 536 | San Fernando |
| Sagayad | 2,747 | 2,576 | 1,869 | 892 | 795 | San Fernando |
| Salcedo (Poblacion) | 1,026 | 798 | 987 | 877 | 936 | Luna |
| Salincob | 544 | 540 | 539 | 461 | 446 | Bacnotan |
| Samara | 2,487 | 2,339 | 2,290 | 1,998 | 1,931 | Aringay |
| San Agustin | 1,943 | 1,881 | 1,589 | 1,483 | 1,386 | San Fernando |
| San Agustin East | 2,322 | 2,323 | 1,804 | 1,563 | 1,424 | Agoo |
| San Agustin Norte | 1,240 | 1,130 | 959 | 864 | 747 | Agoo |
| San Agustin Sur | 1,210 | 1,106 | 1,192 | 1,151 | 982 | Agoo |
| San Antonino | 1,002 | 980 | 858 | 791 | 627 | Agoo |
| San Antonio | 2,209 | 2,193 | 1,839 | 1,820 | 1,431 | Agoo |
| San Antonio | 1,024 | 976 | 979 | 902 | 880 | Aringay |
| San Antonio | 897 | 804 | 719 | 655 | 528 | Naguilian |
| San Benito Norte | 2,428 | 2,256 | 2,021 | 1,782 | 1,340 | Aringay |
| San Benito Sur | 3,354 | 3,227 | 3,170 | 2,815 | 2,315 | Aringay |
| San Blas | 1,230 | 1,242 | 1,080 | 937 | 849 | Bangar |
| San Carlos | 1,361 | 1,074 | 984 | 1,011 | 916 | Caba |
| San Cornelio | 1,373 | 1,406 | 1,347 | 1,338 | 1,382 | Caba |
| San Cristobal | 743 | 735 | 725 | 613 | 563 | Bangar |
| San Eugenio | 3,682 | 3,699 | 3,441 | 3,056 | 2,801 | Aringay |
| San Felipe | 1,351 | 968 | 1,177 | 1,043 | 980 | San Juan |
| San Fermin | 1,111 | 1,083 | 1,022 | 998 | 906 | Caba |
| San Francisco | 1,026 | 956 | 833 | 707 | 654 | Agoo |
| San Francisco | 3,040 | 2,991 | 2,609 | 2,673 | 2,592 | San Fernando |
| San Francisco Norte | 469 | 479 | 521 | 491 | 429 | Sudipen |
| San Francisco Sur | 822 | 830 | 763 | 673 | 608 | Sudipen |
| San Gregorio | 996 | 947 | 955 | 838 | 863 | Caba |
| San Isidro | 1,895 | 1,699 | 1,487 | 1,387 | 1,208 | Agoo |
| San Isidro | 903 | 880 | 873 | 816 | 698 | Naguilian |
| San Joaquin Norte | 1,270 | 1,223 | 1,051 | 803 | 781 | Agoo |
| San Joaquin Sur | 1,436 | 1,467 | 1,345 | 1,176 | 959 | Agoo |
| San Jose | 2,295 | 1,983 | 2,089 | 1,999 | 1,831 | Caba |
| San Jose | 522 | 484 | 440 | 377 | 320 | Rosario |
| San Jose | 829 | 865 | 834 | 795 | 740 | Sudipen |
| San Jose Norte | 787 | 758 | 779 | 677 | 589 | Agoo |
| San Jose Sur | 1,667 | 1,363 | 1,376 | 1,311 | 1,142 | Agoo |
| San Juan | 1,126 | 1,113 | 1,089 | 1,007 | 889 | Agoo |
| San Juan East | 899 | 977 | 911 | 868 | 802 | Aringay |
| San Juan West | 1,182 | 1,105 | 1,073 | 903 | 915 | Aringay |
| San Julian Central | 613 | 588 | 577 | 539 | 494 | Agoo |
| San Julian East | 1,096 | 1,099 | 979 | 878 | 830 | Agoo |
| San Julian Norte | 739 | 680 | 603 | 588 | 562 | Agoo |
| San Julian West | 1,795 | 1,920 | 1,579 | 1,313 | 1,043 | Agoo |
| San Luis | 1,854 | 1,626 | 1,430 | 1,354 | 1,130 | Pugo |
| San Manuel Norte | 1,960 | 1,782 | 1,679 | 1,511 | 1,459 | Agoo |
| San Manuel Sur | 837 | 742 | 701 | 671 | 707 | Agoo |
| San Marcos | 1,849 | 1,969 | 1,730 | 1,490 | 1,316 | Agoo |
| San Martin | 798 | 818 | 724 | 678 | 559 | Bacnotan |
| San Miguel | 1,513 | 1,455 | 1,176 | 989 | 824 | Agoo |
| San Nicolas Central (Poblacion) | 1,020 | 1,068 | 1,095 | 1,068 | 960 | Agoo |
| San Nicolas East | 769 | 793 | 715 | 706 | 514 | Agoo |
| San Nicolas Norte (Poblacion) | 717 | 691 | 661 | 688 | 665 | Agoo |
| San Nicolas Sur (Poblacion) | 2,382 | 2,434 | 492 | 541 | 487 | Agoo |
| San Nicolas West | 535 | 601 | 2,112 | 1,885 | 1,658 | Agoo |
| San Pablo | 1,146 | 1,085 | 861 | 749 | 713 | Balaoan |
| San Pedro | 1,089 | 1,018 | 997 | 887 | 817 | Agoo |
| San Roque East | 793 | 834 | 870 | 907 | 739 | Agoo |
| San Roque West | 1,438 | 1,207 | 1,136 | 956 | 926 | Agoo |
| San Simon East | 1,051 | 868 | 808 | 838 | 761 | Aringay |
| San Simon West | 1,225 | 1,279 | 1,314 | 1,046 | 1,022 | Aringay |
| San Vicente | 2,407 | 2,370 | 2,144 | 1,793 | 1,559 | San Fernando |
| San Vicente Norte | 1,052 | 1,076 | 912 | 882 | 896 | Agoo |
| San Vicente Sur | 1,086 | 1,048 | 792 | 911 | 721 | Agoo |
| Santa Ana | 1,860 | 1,540 | 1,339 | 1,242 | 1,126 | Agoo |
| Santa Barbara (Poblacion) | 1,887 | 1,598 | 1,504 | 1,330 | 1,286 | Agoo |
| Santa Cecilia | 1,823 | 1,716 | 1,681 | 1,448 | 1,219 | Aringay |
| Santa Cruz | 1,212 | 1,194 | 1,074 | 993 | 886 | Bacnotan |
| Santa Fe | 845 | 743 | 732 | 725 | 527 | Agoo |
| Santa Lucia | 2,861 | 2,938 | 3,061 | 2,635 | 2,359 | Aringay |
| Santa Maria | 975 | 773 | 747 | 774 | 641 | Agoo |
| Santa Monica | 995 | 1,121 | 819 | 656 | 561 | Agoo |
| Santa Monica | 1,373 | 1,002 | 1,360 | 1,120 | 1,239 | Bauang |
| Santa Rita | 608 | 620 | 546 | 517 | 481 | Bacnotan |
| Santa Rita (Nalinac) | 1,546 | 1,390 | 1,176 | 1,077 | 985 | Agoo |
| Santa Rita East | 755 | 696 | 631 | 600 | 503 | Agoo |
| Santa Rita East | 1,078 | 1,081 | 1,042 | 881 | 831 | Aringay |
| Santa Rita Norte | 1,020 | 1,028 | 977 | 925 | 865 | Agoo |
| Santa Rita Sur | 1,088 | 989 | 944 | 818 | 815 | Agoo |
| Santa Rita West | 677 | 619 | 590 | 596 | 540 | Agoo |
| Santa Rita West | 3,192 | 3,048 | 2,794 | 2,378 | 1,615 | Aringay |
| Santa Rosa | 463 | 447 | 419 | 383 | 385 | San Juan |
| Santa Teresa | 1,568 | 1,387 | 1,413 | 1,281 | 1,198 | Tubao |
| Santiago | 3,373 | 3,399 | 2,602 | 2,198 | 1,974 | Bauang |
| Santiago Norte | 1,128 | 964 | 1,112 | 1,064 | 955 | Caba |
| Santiago Norte | 3,328 | 3,029 | 2,728 | 1,951 | 1,898 | San Fernando |
| Santiago Sur | 1,910 | 1,627 | 1,616 | 1,320 | 1,238 | Caba |
| Santiago Sur | 1,743 | 1,641 | 1,587 | 1,061 | 800 | San Fernando |
| Santo Domingo Norte | 1,413 | 1,500 | 1,427 | 1,245 | 1,191 | Luna |
| Santo Domingo Sur | 1,012 | 896 | 801 | 693 | 669 | Luna |
| Santo Rosario | 748 | 739 | 675 | 651 | 608 | San Juan |
| Santo Rosario East | 1,443 | 1,414 | 1,313 | 1,143 | 841 | Aringay |
| Santo Rosario West | 1,789 | 1,732 | 1,623 | 1,448 | 1,323 | Aringay |
| Saoay | 741 | 714 | 609 | 480 | 409 | San Fernando |
| Sapdaan | 445 | 400 | 388 | 337 | 302 | Santol |
| Sapilang | 878 | 858 | 854 | 918 | 892 | Bacnotan |
| Saracat | 533 | 493 | 463 | 432 | 431 | San Juan |
| Sasaba | 862 | 850 | 915 | 810 | 795 | Santol |
| Sayoan | 418 | 412 | 383 | 312 | 322 | Bacnotan |
| Saytan | 1,304 | 1,312 | 1,209 | 1,157 | 959 | Pugo |
| Sengngat | 1,319 | 1,135 | 1,065 | 1,003 | 957 | Sudipen |
| Sevilla | 10,612 | 10,990 | 9,619 | 8,503 | 7,362 | San Fernando |
| Siboan-Otong | 787 | 717 | 712 | 664 | 736 | San Fernando |
| Sili | 1,154 | 1,074 | 1,043 | 911 | 760 | Naguilian |
| Sinapangan | 504 | 434 | 404 | 381 | 356 | San Juan |
| Sinapangan Norte | 648 | 572 | 592 | 538 | 529 | Balaoan |
| Sinapangan Norte | 1,000 | 976 | 930 | 810 | 709 | Bangar |
| Sinapangan Sur | 1,128 | 976 | 870 | 842 | 815 | Balaoan |
| Sinapangan Sur | 758 | 778 | 776 | 687 | 680 | Bangar |
| Sipulo | 934 | 910 | 839 | 754 | 687 | Bacnotan |
| Sobredillo | 1,279 | 1,283 | 1,205 | 1,071 | 1,012 | Caba |
| Subusub | 2,586 | 2,423 | 2,142 | 2,217 | 1,978 | Rosario |
| Sucoc Norte | 532 | 528 | 487 | 439 | 454 | Luna |
| Sucoc Sur | 380 | 393 | 392 | 375 | 341 | Luna |
| Suguidan Norte | 793 | 711 | 814 | 809 | 772 | Naguilian |
| Suguidan Sur | 907 | 877 | 926 | 836 | 914 | Naguilian |
| Suyo | 598 | 606 | 584 | 530 | 554 | Luna |
| Suyo (Poblacion) | 1,603 | 1,438 | 1,590 | 1,389 | 1,118 | Bagulin |
| Taberna | 1,868 | 1,846 | 1,666 | 1,418 | 1,400 | Bauang |
| Taboc | 2,807 | 2,679 | 2,356 | 2,423 | 1,985 | San Juan |
| Tabtabungao | 2,460 | 2,592 | 1,925 | 1,536 | 1,370 | Rosario |
| Tagudtud | 978 | 804 | 802 | 716 | 623 | Bagulin |
| Tallaoen | 700 | 677 | 657 | 607 | 613 | Luna |
| Tallipugo | 1,028 | 956 | 906 | 932 | 807 | Balaoan |
| Talogtog | 1,681 | 1,591 | 1,123 | 1,079 | 896 | San Juan |
| Tammocalao | 1,263 | 1,239 | 1,060 | 920 | 778 | Bacnotan |
| Tanglag | 637 | 602 | 533 | 558 | 469 | Rosario |
| Tanqui | 4,907 | 5,318 | 4,889 | 4,398 | 4,455 | San Fernando |
| Tanquigan | 988 | 951 | 782 | 755 | 645 | San Fernando |
| Tavora East | 748 | 691 | 619 | 589 | 588 | Pugo |
| Tavora Proper | 1,196 | 1,097 | 980 | 867 | 877 | Pugo |
| Tay-ac | 2,362 | 2,207 | 1,802 | 1,418 | 1,533 | Rosario |
| Tio-angan | 917 | 1,729 | 775 | 781 | 700 | Bagulin |
| Tococ | 1,140 | 1,032 | 991 | 843 | 880 | Santo Tomas |
| Tubaday | 800 | 712 | 623 | 596 | 539 | Santol |
| Tubod | 2,485 | 2,274 | 2,221 | 1,901 | 1,720 | Santo Tomas |
| Tuddingan | 1,570 | 1,307 | 1,436 | 1,326 | 1,198 | Naguilian |
| Turod | 754 | 788 | 849 | 685 | 626 | Sudipen |
| Ubagan | 1,786 | 1,615 | 1,501 | 1,403 | 1,116 | Santo Tomas |
| Ubbog | 596 | 573 | 516 | 472 | 410 | Bacnotan |
| Ubbog | 1,310 | 1,124 | 1,075 | 962 | 862 | Bangar |
| Udiao | 2,214 | 2,236 | 1,928 | 1,655 | 1,387 | Rosario |
| Up-uplas | 533 | 579 | 550 | 599 | 543 | Sudipen |
| Upper San Agustin | 1,053 | 1,147 | 1,008 | 804 | 791 | Bauang |
| Upper Tumapoc | 832 | 790 | 708 | 603 | 509 | Burgos |
| Urayong | 1,455 | 1,381 | 1,403 | 1,151 | 950 | Bauang |
| Urayong | 658 | 664 | 646 | 615 | 545 | Caba |
| Urbiztondo | 1,850 | 1,826 | 1,525 | 1,289 | 1,005 | San Juan |
| Victoria (Poblacion) | 1,331 | 1,232 | 1,162 | 1,087 | 1,036 | Luna |
| Vila | 2,245 | 1,294 | 1,197 | 1,116 | 1,017 | Rosario |
| Wallayan | 1,043 | 948 | 916 | 872 | 737 | Bagulin |
| Wenceslao | 360 | 338 | 340 | 274 | 239 | Caba |
| Zaragosa | 551 | 565 | 528 | 454 | 435 | Bacnotan |
| Barangay | 2010 | 2007 | 2000 | 1995 | 1990 | City or municipality |
| *Italicized names are former names. *Dashes (–) in cells indicate unavailable census data. |||||||